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4 cards from this section. Quick, good the night before a test.
What do we call a force that requires contact between objects?
Think about forces that need things to touch.
What type of force does a person apply when they lift something?
Consider the muscles that move things.
What type of force does not require contact?
Which force can act even when things aren't touching?
True or False: Friction helps an object to speed up?
Think about a slide: does it speed you up or slow you down?
If two people are lifting a large box, and one applies a force of 50N while the other applies a force of 70N, what is the total muscular force applied?
Add the forces together.
A magnet can attract a metal clip from a distance. If the magnet is moved further away, what happens to the magnetic force?
Consider how the strength of attraction changes with distance.
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